New article on canister monitoring of air toxics
Wednesday, 28 March 2018 at 10:28:AM
A recent issue of LCGC: The Column features an article by Markes’ analysts that demonstrates the suitability of a combined autosampler–TD–GC–MS system to sample, pre-concentrate and detect a range of air toxics in humid air collected in canisters.
A key feature of the system is the use of the Kori-xr trap-based water removal device to eliminate humidity from the air sample, making it possible to detect 65 target compounds ranging from propene to naphthalene, with method detection limits as low as 0.7 pptv in SIM mode. Importantly, ultra-volatiles and polar species are unaffected by the water removal process, which stands in contrast to conventional approaches such as Nafion® dryers and trap dry-purging.
The authors also point out that the performance of the system makes it compliant both with standard TO-15 methods, and with 'trace TO-15' methods stipulating lower detection limits.
Original article: M.
Aragon, R. Li and D. Barden, Going beyond the requirements of US EPA Method
TO-15: Cryogen-free monitoring of trace-level "air toxics" at high
humidity, LCGC: The Column, October 2017, Issue 15, pp. 11–16.